DX Engineering DXE-BFS-1, Руководство пользователя

Страница: 2 / 12

- 1 -
Introduction
The
DXE-BFS-1 is a single-wire, single direction Beverage Feed System. This W8JI design is
immune to strong signal overload and core saturation common in multi-transmitter contesting
environments, and is used by winning contest stations and low-band DXers. The unit uses an
isolated-winding, matching transformer system to significantly increase the signal-to-noise ratio in
Beverage and other high impedance antennas.
The
DXE-BFS-1 works with antenna impedances from 400 to 500 Ω.
Included with the DXE-BFS-1 is a 470 Ω, 2-Watt non-inductive
termination resistor that withstands nearby lightning strikes significantly
better than hard to find carbon composition resistors. DX Engineering has
replacement resistors available, part number
DXE-ECM-R470-2.
The feedline impedance of the
DXE-BFS-1 is optimized for 75 Ω,
however, any feedline between 30 Ω and 100 Ω can be used. While not
intended for transmitting, the
DXE-BFS-1 can withstand power levels of
20 watts continuously, 200 watts for 5 seconds or the power rating of the termination resistor,
whichever is less. The
DXE-BFS-1 coaxial cable connection uses an industry standard CATV F
type connector.
The
DXE-BFS-1 sets itself apart from competitive products by combining quality components and
superior technology inside a compact metal housing.
Features

100 kHz to 30 MHz operating range

Integral spark gaps built into the internal printed circuit board minimize damage from
lightning

Wing nut terminals eliminate soldering

Metal housings used for superior shielding and improved life

Flange-mount holes for easy mounting

Ground isolated secondary essential for building beverage arrays and can be connected with
normal or reverse phase

RoHS compliant assembly
The
DXE-BFS-1 uses an isolated-winding, matching transformer system that significantly increases
the signal to noise ratio in Beverage and other high impedance antennas. This unit is immune to
strong signal overload and core saturation common in multi-transmitter contesting environments,
and is used by winning contest stations and low-band DXers.
Coaxial Cable and Connectors
The feedpoint matching system is optimized for 75 Ω feedline. This allows the use of 75 Ω CATV
type coaxial cable and F style connectors. We recommend using high quality “flooded” 75 Ω RG-6
type coaxial cable, DX Engineering part number
DXE-F6-CTL or DXE-F6-1000 . Flooded coaxial